Heating system.



No. 897,609. 4 PATENTED SEPT. 1 1908.

E. N. FAIROHILD.

HEATING SYSTEM.

APPLICATION FILED JUNE 4, 1908.

UNITED STATES PATENT OFFICE.

'EGBERT N. FAIROHILD, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE-HALF TO M. A.

' LEHMAN, ,OF MINNEAPOLIS, MINNESOTA.

HEATING SYSTEM.

To all whom it may concern:

Be it known that I, EGBER'I N. FAIRCHILD,

of Minneapolis, Hennepin county, Minnesota, have invented certain new and useful Improvements in Heating'Systems, of which the following is. a s ecification.

- My invention re ates articularly to hot water heating systems. i such a system for residence heating, considerable difficulty has been experienced in the early fall andspring to provide sufficient fire to heat the water in the morning for the purpose of taking the chill ofi the house without overheating the house when the fire is once under way and the water in circulation. A small wood fire lasting but a few moments would be suflicient to heat the water in the system and cause it to circulate through the radiators and warm the house suificiently for the day,-but it is of course impracticable to build awood fire upon the coals in the grate, and if a sufiicient amount of coal is to be put on to heat the water it has been found almost impossible to check the fire when the house has been warmed. Great discomfort and waste of fuel has therefore resulted from V the o eration of the ordinary hot water heating p ant in mild weather.

The object therefore 'of my invention is to provide an auxiliary or supplementary heatmg attachment in connection with the sys tem by means of which the water can be heated without increasing the fire in the pri mary boiler or heater.

My invention consists generally in a hot water heating system and an auxiliary heater in connection therewith.

Further, the invention consists in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims. r

In the accompanying drawings forming part of this speclfication, Figure 1 is a side elevation partially in section, of' a hot water heater with my invention applied thereto.

Fig. 2 is a vertical sectional view of'a modified form of auxiliary heater.

In the drawing, 2 represents the main or primary boiler or heater having a water sup I ply pipe 3 and smoke flue 4. A riser 5 leads to the radiators and is provided with a check valve 6 and a return pi e 7 has a valve 8. So far the apparatus is o ordinary construction andin general use. At one side of the heater I provide an auxiliary heater 9 having Specification of Letters Patent. Application filed June 4, 1908. Serial No. 436,631.

n the operation of Patented Sept. 1, 1908.

i a circulating chamber 10 around the fire box 11 communicating at the top witlrthe riser 5 through a pipe 12 having acheck valve 13.

The lower part of the circulating chamber 10 is connected bya pipe 14 with the return pipe 7 and is provided with a valve 15. By closing'the valve 15 the auxiliary heater may be entirely cut off from the system. A grate 16 is provided in the fire box 11 and a passageway 17 leads into the fire box of the main heater and has a valve 18 that is adapted to close the said passageway. A smoke flue 19 leads from the top of the fire box into the flue 4. The operator is thus able to direct the products of combustion into the fire box of the main heater or directly from thefire box 11 through the smoke flue 19 into the flue 4.

If there is a fire in the main boiler and the operator desires a quick heat in the radiators withoutincreasing the fire in the main boiler, he will open the valve leading to the circulating chamber of the auxiliary boiler and build a fire of wood or other quick burning material on the grate 16. The capacity of the circulating chamber 10 being much less than that of the main boiler the water will be heated more quickly, and circulating through the system will warm the rooms sufliciently to take ofi the chill, and by the time the desired temperature is obtained the fire in the auxiliary boiler will have burned out and there will be no danger of over-heating the house. Neither will it benecessary to disturb the fire in the main boiler which may be run as low as the outside temperature may demand. hen the system is first started up in the fall before any fire is made in the main boiler it may be cut off from the system by closing the valve 8 and the auxiliary boiler used alone until such time as the weather demands the additional heating capacity of the large boiler After the main boiler is once started the auxiliary one may be cut oil' during the extreme cold weather and utilized on days of mild temperature merely for the pureat of the supplementary boiler arranged in close contact with that of the main boiler and 7 formedindependently thereof so that the,

apparatus may be utilized with hot water systemsalready inuse. o,

' heating system com risinga main boiler or 4 heater having a sme l culating chamber, a riser and return -pipef connected with said-chamber; of aroomparae tively small'supplementary boiler also hav- I claim as my invention:

- .1; The combination',,w1th a-hot water 6 flue and a water ciring a smoke flue and a circulating chamber,

and pipe connections-with said riser and re-' turn pipe, and said supplementary boiler beadapted to tem'orarily' augment the heating surface of $2.181 :Inainfboiler, for the purpose s ecified;

. 2. In a otwaterheating'system, the com-- bination, with the main boiler hav flue for the products of combustion and, a. circulating chamber, of a supplementary boiler having a fire box and a circulating chamber surrounding the same and a flue leading from said fire box -into the firebox ofsaid main boiler,circulating pipes leading fromthe circulating chamber of said supplementary" boiler to said riser andre'turn plpes; a dis chargepipe for the products of combustion leadin from said fire box, and a valve ar range in' the fluebetweenthe fire box of said main and supplementary boilers Wherebythe products of combustion in said su plemen-b ftary boiler may be directed to the e box of my hand this 'a riser and return pipe connections and fa discharge said main boiler or into saiddischarge pipe, substantially as described.

In 'tness whereof,- I

have hereunto set was 

